Create Post - Genviral

Schedule or publish immediately to one or more connected accounts.

Before you post

Use an API key for a workspace with an active Creator, Professional, or Business subscription.
Call GET /accounts and pick account UUIDs.
Check each account’s capabilities.supported_content_kinds and caption_limit.
Build the payload below. Only include provider settings for platforms you are actually targeting.

Omit media or set it to null only when every selected account supports text_only.

Request body

caption

string

required

Shared caption text. Final length is checked per targeted account after lookup (hosted accounts: 500 chars max).

accounts

array

required

One to ten account objects: [{ "id": "<uuid-from-/accounts>" }].

media

object | null

Optional. video, slideshow, or null/omit for text-only posts.

Show Video

type

string

required

video

url

string

required

Direct MP4/MOV/M4V/AVI URL. Google Drive links work.

duration_sec

number

Duration in seconds. Also accepts duration_seconds, duration, durationSec, or video_duration_sec. Required for non-premium X video posts.

bytes

number

Optional size in bytes. Also accepts size.

width

number

Optional width in pixels.

height

number

Optional height in pixels.

mime_type

string

Optional MIME type. Alias: mime.

metadata

object

Optional nested object that can repeat width, height, mime_type, and bytes.

Show Slideshow

type

string

required

slideshow

urls

string[]

required

1–35 JPG/JPEG/PNG image URLs, in order.

scheduled_at

string

ISO 8601 datetime with timezone offset (for example 2026-05-21T15:00:00Z). Omit or send a time within 30 seconds of now for immediate publish (status: pending). For true scheduled posts, the time must be at least 2 minutes in the future.

external_id

string

Recommended idempotency key (max 128 chars). Same key + same payload replays the original post (200, duplicate: true). Same key + different payload returns 409 create_failed. If omitted, the API dedupes from a SHA-256 fingerprint of the request body instead; a conflicting replay also returns 409 create_failed.

music_url

string

TikTok-only. A TikTok post URL used to resolve the track. Rejected when any non-TikTok account is selected, including Instagram.

Provider settings

Use settings.<provider> for X, Instagram, Facebook, LinkedIn, Bluesky, and YouTube. For TikTok and Pinterest on create, use the top-level tiktok and pinterest objects — not settings.tiktok or settings.pinterest. Top-level fields run the full create-time validation (BYO-only TikTok, hosted TikTok rejection, MEDIA_UPLOAD rules, and field limits). Only send settings for providers present in your accounts list. Unknown settings keys return 422 invalid_payload.

capabilities.settings_schema from GET /accounts reflects the dashboard composer, not always the Partner API field names. Use the tables below when building create payloads.

YouTube — `settings.youtube`

Requires a video post to a YouTube account.

Field	Type	Required	Notes
`title`	string	No	Max 100 chars. If omitted, derived from `settings.youtube.description`, then `caption` (first non-empty line).
`description`	string	No	Overrides `caption` as the YouTube description when set.
`type`	string	No	Visibility: `public`, `private`, or `unlisted`. Default `public`. Alias: `privacy`.
`privacy`	string	No	Same as `type`.
`tags`	array	No	`{ "value": "...", "label": "..." }` items. Publish uses `label` values. Total tag length capped at publish time.
`categoryId`	string	No	YouTube category ID.
`selfDeclaredMadeForKids`	string	No	`yes` or `no`. Default `no`. Boolean alias: `madeForKids`.
`thumbnail`	object	No	Custom thumbnail: `{ "path": "<image-url>" }`.

TikTok — top-level `tiktok`

Requires BYO TikTok accounts and media (video or slideshow). Hosted TikTok accounts cannot use TikTok-specific settings. For video posts, the merged publish text built from caption, tiktok.title, and tiktok.description must stay ≤ 2,200 characters combined.

Field	Type	Notes
`title`	string	Video: max 2,200 chars. Slideshow: max 90 chars.
`description`	string	Slideshow: max 4,000 chars. Video: used as the publish body when `caption` is empty.
`post_mode`	string	`DIRECT_POST` or `MEDIA_UPLOAD` (slideshow drafts only). Defaults to `DIRECT_POST` at publish time when omitted.
`privacy_level`	string	`PUBLIC_TO_EVERYONE`, `MUTUAL_FOLLOW_FRIENDS`, `FOLLOWER_OF_CREATOR`, `SELF_ONLY`.
`music_usage_confirmation`	boolean	Confirms the user has accepted TikTok’s music-usage terms for this post. Preferred Partner API field.
`user_consent`	boolean	Legacy alias for `music_usage_confirmation`.
`disable_comment`	boolean	Inverted to allow/deny comments.
`disable_duet`	boolean	Video only.
`disable_stitch`	boolean	Video only.
`auto_add_music`	boolean	Slideshow only.
`is_your_brand`	boolean	Own-brand commercial content.
`is_branded_content`	boolean	Third-party promotion.
`video_cover_timestamp_ms`	integer	Video `DIRECT_POST` only. Frame offset in milliseconds for the TikTok thumbnail.

Pinterest — top-level `pinterest`

Requires at least one Pinterest account and image media.

Field	Type	Notes
`board_id`	string	Pinterest board ID. Required for a successful pin publish — no account default is applied. Max 128 chars.
`title`	string	Optional pin title. Max 100 chars.
`link`	string	Optional destination URL. Max 2,048 chars.
`tags`	string[]	Up to 30 tags, 1–100 chars each. Appended to the pin description; total description must stay ≤ 800 chars.

X — `settings.x` or `settings.twitter`

Field	Type	Required	Notes
`who_can_reply_post`	string	No	`everyone` (default), `following`, `mentionedUsers`, `subscribers`, `verified`.
`community`	string	No	X community URL: `https://x.com/i/communities/<id>`.
`made_with_ai`	boolean	No	Default `false`.
`paid_partnership`	boolean	No	Default `false`.

Instagram — `settings.instagram` or `settings.instagram-standalone`

Both keys map to the same stored settings. If both are sent, instagram-standalone wins.

Field	Type	Required	Notes
`post_type`	string	Recommended	`post` (feed/reel) or `story`.
`is_trial_reel`	boolean	No	Trial reel flag for video posts.
`graduation_strategy`	string	No	`MANUAL` or `SS_PERFORMANCE` when using trial reels.
`collaborators`	array	No	`[{ "label": "<username>" }]`. Ignored for stories.
`cover_url`	string	No	Custom Reel cover image URL. Takes priority over `thumb_offset_ms`. Video `post_type: post` only. Must be publicly accessible. BYO Instagram only — hosted accounts reject cover settings.
`thumb_offset_ms`	integer	No	Reel thumbnail frame offset in milliseconds when `cover_url` is omitted. Video `post_type: post` only. BYO Instagram only.
`share_to_feed`	boolean	No	Share the Reel to the main feed. Default `true`. Set `false` for Reels tab only. BYO Instagram only.

Facebook — `settings.facebook`

Field	Type	Required	Notes
`url`	string	No	Optional link attachment URL on the post.

LinkedIn — `settings.linkedin` or `settings.linkedin-page`

Both keys map to the same stored settings. If both are sent, linkedin-page wins.

Field	Type	Required	Notes
`post_as_images_carousel`	boolean	No	Post multi-image content as a LinkedIn carousel/PDF.
`carousel_name`	string	No	Carousel/PDF title. Default `slides`.

Bluesky — `settings.bluesky`

No provider-specific fields. Send {} or omit.

Settings key reference

Request key	Alias	Stored as
`settings.x`	`settings.twitter`	`xSettings`
`settings.instagram-standalone`	`settings.instagram`	`instagramSettings`
`settings.linkedin-page`	`settings.linkedin`	`linkedinSettings`
Top-level `tiktok`	—	`tikTokSettings`
Top-level `pinterest`	—	`pinterestSettings`

Limits (quick reference)

Video: MP4/MOV/M4V/AVI, under 100MB. Hosted accounts: 15–60s when duration is provided.
Non-premium X video: duration metadata required; max 140 seconds.
Slideshow: 1–35 images, each under 5MB.
Caption caps (BYO): X 280 (4,000 for premium accounts); Instagram 2,200; TikTok video 2,200 / photo description 4,000; LinkedIn 3,000; Pinterest 800; YouTube 5,000 bytes; Facebook 63,206.

Response

Fresh creates return 201. Idempotent replays return 200.

{
  "ok": true,
  "code": 201,
  "message": "Post scheduled",
  "data": {
    "id": "11111111-1111-1111-1111-111111111111",
    "status": "scheduled",
    "scheduled_at": "2026-05-21T15:00:00Z",
    "warnings": []
  }
}

duplicate: true appears on idempotent replays. warnings are non-blocking (for example missing video duration metadata).

Examples

curl --request POST \
  --url https://www.genviral.io/api/partner/v1/posts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "caption": "Weekly product recap and what shipped this sprint.",
  "media": {
    "type": "video",
    "url": "https://cdn.example.com/recap.mp4",
    "duration_sec": 42
  },
  "accounts": [{ "id": "YOUR_YOUTUBE_ACCOUNT_ID" }],
  "settings": {
    "youtube": {
      "title": "Weekly product recap",
      "type": "public"
    }
  },
  "external_id": "yt-recap-2026-05-21"
}'

Errors

Code	When
`422 invalid_payload`	Schema validation failed (includes `issues` array)
`400 invalid_json`	Request body is not valid JSON
`400 validation_failed`	Caption, media, music, TikTok/Pinterest, or schedule rules failed
`400 unknown_accounts`	Account ID outside key scope
`400 media_unreachable`	Media URL not reachable
`400 invalid_music_url`	Invalid or non-TikTok music URL
`401`	Missing or invalid API key
`402 subscription_required`	No active Creator, Professional, or Business subscription
`403 subscription_required`	Hosted TikTok posting without an active TikTok virtual subscription
`403 tier_not_allowed`	Scheduler tier blocked
`409 create_failed`	Same `external_id` or dedupe fingerprint reused with a different create payload
`500 create_failed`	Unexpected upstream failure

Documentation Index

​Before you post

​Request body

​Provider settings

​YouTube — settings.youtube

​TikTok — top-level tiktok

​Pinterest — top-level pinterest

​X — settings.x or settings.twitter

​Instagram — settings.instagram or settings.instagram-standalone

​Facebook — settings.facebook

​LinkedIn — settings.linkedin or settings.linkedin-page

​Bluesky — settings.bluesky

​Settings key reference

​Limits (quick reference)

​Response

​Examples

​Errors

Before you post

Request body

Provider settings

YouTube — `settings.youtube`

TikTok — top-level `tiktok`

Pinterest — top-level `pinterest`

X — `settings.x` or `settings.twitter`

Instagram — `settings.instagram` or `settings.instagram-standalone`

Facebook — `settings.facebook`

LinkedIn — `settings.linkedin` or `settings.linkedin-page`

Bluesky — `settings.bluesky`

Settings key reference

Limits (quick reference)

Response

Examples

Errors